What is the difference between ground state and excited state in chemistry?

How many moles are there in 141g of AI2O3?

Rubidium has two naturally occurring isotopes, rubidium - 85 (atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium - 87 (atomic mass = 86.9092; abundance = 27.85%). Calculate the atomic weight of rubidium

Analysis of a compound containing only C and Cl revealed that it contains 33.33 % C atoms by number and has a molar mass of 248.75 g/mol. What is the molecular formula of this compound?

How do we use properties of matter in our every day lives

What is diffusion? A. The mixing of gas molecules due to random motion B. The force created when gas molecules hit their container C. The total number of molecules within a volume of gas D. The space occupied by gas molecules moving around

Where did the earth hold most of its original water

Giovanni created this chart to study for an exam. A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.

Which of the following statements about the suns feature is true?